i missed all the shannanigans and most of the march...

Likewise - busy walking part of the Pembrokeshire Coastal Path with my wife over the weekend. 

... and some complained about the violence agenda by a minority overtaking the point of the argument...

driving to Pembrokeshire yesterday morning, I was interested to listen to an interview with Brendan Barber (TUC Gen. Sec.).  Rather than condemning the groups who are married to violent demonstration from the outset, he dodged the question by suggesting that that was their means of action, whereas it wasn't the TUC's.  Not overly clever, in my view.  I realise that some  Labour MPs have distanced themselves from the violence, while some others have spoken out against it.
 

what though are the key issues here in your view....  for political debate?

  The theme for the march was 'March for the Alternative'.  From what I understand, for some of the marchers, the alternative was no cuts at all; for others, it was cuts - yes - but applied slower.

So, just what is the alternative that the TUC are promoting?